package com.bear.lock;

import java.util.Random;

/**
 * 转账练习
 *
 * @author LiuShanshan
 * @version V1.0
 * @Description
 */
public class ExerciseTransfer {
    // Random 为线程安全
    static Random random = new Random();

    // 随机 1~100
    public static int randomAmount() {
        return random.nextInt(100) + 1;
    }

    public static void main(String[] args) throws InterruptedException {
        Account a = new Account(1000);
        Account b = new Account(1000);
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 1000; i++) {
                a.transfer(b, randomAmount());
            }
        }, "t1");
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 1000; i++) {
                b.transfer(a, randomAmount());
            }
        }, "t2");
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        // 查看转账2000次后的总金额
        System.out.println((a.getMoney() + b.getMoney()));
    }
}

    class Account {
        private int money;

        public Account(int money) {
            this.money = money;
        }

        public int getMoney() {
            return money;
        }

        public void setMoney(int money) {
            this.money = money;
        }

        public void transfer(Account target, int amount) {
            if (this.money > amount) {
                this.setMoney(this.getMoney() - amount);
                target.setMoney(target.getMoney() + amount);
            }
        }
    }
